Heat oil in a wok. Add the ginger and chopped onions (white part).Sautxe9 for few minutes.Add the carrots and then add the cabbage.Cook for a few minutes then add the capsicum.When the veggies are just cooked add the sauces, salt and sugar.Add some water to the veggies.In a small bowl mix the cornflour with little water.Add it to the veggies and mix nicely.Cook till the gravy becomes little thick and saucy.Sprinkle pepper powder. Serve hot with Veg Fried Rice.